Research on the Friction Performance of Bionic Surface Based on the Clamber Animal Foot Pad

2013 ◽  
Vol 427-429 ◽  
pp. 298-301
Author(s):  
Chun Jian Su ◽  
Zhou Yu Fu ◽  
Hui Sun ◽  
Xiao Shen
Keyword(s):  
Sliding Friction ◽  
External Surface ◽  
Surface Friction ◽  
Friction Mechanism ◽  
Micro Particles ◽  
Bionic Surface ◽  
Friction Performance ◽  
Foot Pad ◽  
The Mathematical Model ◽  
Center Distance

The clamber animal foot pads were researched by the Super Depth of Field3D Microscopic System marked VHX-600 and the flexible non-smooth surface friction mechanism of clamber animal foot pad was analysed through bionic tribology. The total friction includes two aspects: a) The sliding friction caused by the adsorbability between clamber animal foot pad and external surface. b) The embedding resistance caused by the external surface micro particles embedded into clamber animal foot pad. The mathematical model of single convex hull was built and the different center distance bionic surfaces were designed, the friction contact simulation of bionic surface was done by ANSYS and the friction performance of bionic surface was verified through the plane friction testbed.

Analysis on the Friction Performance of the Bionic Surface with the Convex Domes for Increasing Friction

2012 ◽  
Vol 232 ◽  
pp. 102-105
Author(s):  
Hui Sun ◽  
Lin Jing Xiao ◽  
Chuan Yu Sun
Keyword(s):  
Friction Force ◽  
Sliding Friction ◽  
Research Result ◽  
Structural Features ◽  
Contact Transformation ◽  
Theory Analysis ◽  
Friction Mechanism ◽  
Bionic Surface ◽  
Additional Resistance ◽  
Friction Performance

The surface micro textures on the feet of the animals such as flies, geckos and tree frogs have been studied. According to the research result and the science of the bionic tribology, the bionic surfaces with the convex domes which possess the certain structural features are obtained. They can increase the friction coefficient. The increasing friction mechanism of the bionic surface with the convex domes is analyzed using the methods of theory analysis, simulation and experimental verification. The friction force between the bionic surface with the convex domes and the belt consists of the sliding friction force and the additional resistance resulting from the inlaying meshing effect. The contact transformation of the bionic surface with cylindrical convex domes and the belt is simulated by the software ANSYS. The increasing friction effect of the bionic surface with the cylindrical convex domes is verified by the experiments.

Design and Analysis on the Increasing Friction Mechanism of the Convex-Hull-Typed Bionic Driving Drum

2012 ◽  
Vol 472-475 ◽  
pp. 2562-2567
Author(s):  
Hui Sun ◽  
Lin Jing Xiao ◽  
Chun Jian Su
Keyword(s):  
Convex Hull ◽  
Friction Force ◽  
Sliding Friction ◽  
Measuring System ◽  
Convex Hulls ◽  
Tree Frog ◽  
Friction Mechanism ◽  
Bionic Surface ◽  
Additional Resistance ◽  
Rubber Belt

The micro textures in the foot surface of the animals such as locust and tree frog have been analyzed with the bionic tribology and several kinds of the convex-hull-typed bionic driving drums are designed. According to the friction mechanism of the rubber material and the simulation results by the software ANSYS, the increasing friction mechanism of the convex-hull-typed bionic driving drum is analyzed. When the convex-hull-typed bionic driving drum contacts with the rubber belt, besides the sliding friction force, the friction force between them also includes the additional resistance resulted from the inlaying ‘meshing effect’ between the convex hulls and the rubber belt. The convex hulls on the surface diminish the contact area, so does the sliding friction force. Therefore, only if the additional resistance greater than the decrease of the sliding friction force, the convex-hull-typed bionic surface can increase the friction force. The dynamic tension measuring system of the belt conveyor is designed and manufactured to measure the friction coefficient between the belt and the driving drum. The experiment results prove that the convex-hull-typed bionic driving drums that meet the certain conditions have the increasing friction effect. The research achievement can be used in many situations which need increase the friction force.

Friction Performance of the Bionic Surfaces with Convex Domes

2012 ◽  
Vol 538-541 ◽  
pp. 226-229
Author(s):  
Hui Sun ◽  
Lin Jing Xiao ◽  
Zhou Yu Fu
Keyword(s):  
Friction Coefficient ◽  
Smooth Surface ◽  
Test Results ◽  
Test Bed ◽  
Friction Mechanism ◽  
Press Temperature ◽  
The Press ◽  
Rubber Surface ◽  
Bionic Surface ◽  
Friction Performance

The bionic surfaces with convex domes were designed based on the bionic tribology. Using the self-made test-bed for measuring the plane friction coefficient, the friction coefficients between the samples and the belt were measured. The belt’s type used for tests is NN-100 and its number of plies is three, as a fixed contact surface. The samples consisted of the convex dome with spherical crown, convex cylinder and smooth rubber surface as a comparative sample as well. The influences of the press, temperature and loading time on the friction performance of the bionic surface with convex dome were analyzed by the friction coefficient in the different conditions. Compared with the measuring result of the smooth rubber surface, the increasing-friction effect of the bionic surface is analyzed and the influences on the bionic surface from the factors mentioned above are examined if they are the same with those on the smooth surface. According to the test results, the influences on the friction performance from the shape, dimension and hardness of the convex dome are discussed and the increasing-friction mechanism is analyzed.

Research on the Relationship between Bionic Surface Friction Coefficient and Interface Medium

2013 ◽  
Vol 712-715 ◽  
pp. 387-390
Author(s):  
Bo Xu ◽  
Zhou Yu Fu ◽  
Zhao Yang Sun
Keyword(s):  
Friction Coefficient ◽  
Coal Particle ◽  
Friction And Wear ◽  
Performance Test ◽  
Surface Friction ◽  
Conveyor Belt ◽  
Bionic Surface ◽  
Tree Frogs ◽  
Friction Performance ◽  
The Relationship

The convex structure on tree frogs foot pats provide huge adsorption force, we can extract this facture of tree frogs foot pats, and apply on the surface of belt conveyor drum encapsulation in order to increase friction between drum and conveyor belt. But the environment underground is complex. There is always has coal particle and water on the frictional contact surface. The friction performance test was done by MMW-1A universal friction and wear tester in order to verify the friction coefficient of bionic surface under different conditions. At last, we figure out that water or coal particle has little influence on bionic friction surface, but has huge influence on common surface.

DETERMINATION OF PERFORMANCE INDICATORS OF THE TRUCK KrAZ-6510TE

2020 ◽  
pp. 19-26
Author(s):  
Olexandr Pavlenko ◽  
Serhii Dun ◽  
Maksym Skliar
Keyword(s):  
Mathematical Model ◽  
Surface Friction ◽  
Building Structures ◽  
Maximum Torque ◽  
Military Equipment ◽  
Military Vehicles ◽  
Force Magnitude ◽  
Vehicle Mobility ◽  
The Mathematical Model

In any economy there is a need for the bulky goods transportation which cannot be divided into smaller parts. Such cargoes include building structures, elements of industrial equipment, tracked or wheeled construction and agricultural machinery, heavy armored military vehicles. In any case, tractor-semitrailer should provide fast delivery of goods with minimal fuel consumption. In order to guarantee the goods delivery, tractor-semitrailers must be able to overcome the existing roads broken grade and be capable to tow a semi-trailer in off-road conditions. These properties are especially important for military equipment transportation. The important factor that determines a tractor-semitrailer mobility is its gradeability. The purpose of this work is to improve a tractor-semitrailer mobility with tractor units manufactured at PJSC “AutoKrAZ” by increasing the tractor-semitrailer gradeability. The customer requirements for a new tractor are determined by the maximizing the grade to 18°. The analysis of the characteristics of modern tractor-semitrailers for heavy haulage has shown that the highest rate of this grade is 16.7°. The factors determining the limiting gradeability value were analyzed, based on the tractor-semitrailer with a KrAZ-6510TE tractor and a semi-trailer with a full weight of 80 t. It has been developed a mathematical model to investigate the tractor and semi-trailer axles vertical reactions distribution on the tractor-semitrailer friction performances. The mathematical model has allowed to calculate the gradeability value that the tractor-semitrailer can overcome in case of wheels and road surface friction value and the tractive force magnitude from the engine. The mathematical model adequacy was confirmed by comparing the calculations results with the data of factory tests. The analysis showed that on a dry road the KrAZ-6510TE tractor with a 80 t gross weight semitrailer is capable to climb a gradient of 14,35 ° with its coupling mass full use condition. The engine's maximum torque allows the tractor-semitrailer to overcome a gradient of 10.45° It has been determined the ways to improve the design of the KrAZ-6510TE tractor to increase its gradeability. Keywords: tractor, tractor-semitrailer vehicle mobility, tractor-semitrailer vehicle gradeability.

scholarly journals Tribological properties of MoS2 coating for ultra-long wear-life and low coefficient of friction combined with additive g-C3N4 in air

Friction ◽  
2020 ◽  
Author(s):  
Yupeng Zhang ◽  
Panpan Li ◽  
Li Ji ◽  
Xiaohong Liu ◽  
Hongqi Wan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Solid Lubricant ◽  
Sliding Friction ◽  
Friction Mechanism ◽  
X Ray ◽  
Lubricating Film ◽  
Valence States ◽  
Transmission Electron ◽  
Wear Life

Abstract The solid lubricant MoS2 demonstrates excellent lubricating properties, but it spontaneously oxidizes and absorbs moisture in air, and thus results in poor wear resistance and short wear-life. In this study, the additive g-C3N4 (CN) was successfully combined with MoS2 via hydrothermal synthesis as a solid lubricant for the first time. Meanwhile, a low friction coefficient (COF, μ = 0.031) and ultra-long wear-life of CN/MoS2 compared to pure MoS2 in air were demonstrated. The functional groups and good crystallinity of the lubricant material were characterized via Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). The formed valence states in CN/MoS2 were analyzed via X-ray photoelectron spectroscopy (XPS). The characterized results of the scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) show the morphology and interior crystal phase structure of CN/MoS2. From the cross-section analysis, the presence of iron oxide nanoparticles lubricating film is synergistic with CN/MoS2 film during the friction process, resulting in its ultra-long wear-life. In particular, the friction mechanism of interlayer sliding friction combined with energy storage friction was analyzed and proposed.

Laboratory and Field Evaluation of Single Layer and Double Layer High Friction Surface Treatments

2019 ◽  
Vol 2673 (2) ◽  
pp. 552-561 ◽  
Author(s):  
Shuo Li ◽  
Peiliang Cong ◽  
Demei Yu ◽  
Rui Xiong ◽  
Yi Jiang
Keyword(s):  
Double Layer ◽  
Friction Surface ◽  
Single Layer ◽  
Aggregate Size ◽  
Surface Friction ◽  
Field Evaluation ◽  
The United States ◽  
Aggregate Gradation ◽  
State Highway ◽  
Friction Performance

High friction surface treatment (HFST) has been proactively used as a solution to extreme friction demands at locations such as horizontal curves, ramps, bridge decks, and intersections. Considerable efforts have been made to evaluate the use of HFST across the United States (U.S.) The American Association of State Highway and Transportation Officials (AASHTO) has issued a provisional specification, i.e., AASHTO PP 79-14, to help state Departments of Transportation (DOTs) to successfully apply HFST. This paper presents a further effort made by the authors to evaluate and compare the friction performance and durability of single and double layer HFTS systems with calcined bauxite aggregate. The laboratory accelerated polishing was conducted to evaluate the effects of aggregate candidate gradations on the friction performance, such as friction coefficient and macrotexture mean profile depth (MPD), and to determine the aggregate gradation for field evaluation. Field evaluation was conducted on both single and double layer HFST systems using test strips under actual traffic polishing over a time period of nine months that covered an entire snow season. It was found that larger aggregate size tends to yield larger MPD, but larger MPD does not necessarily imply larger friction. The double layer HFST did not outperform the single layer HFST with respect to friction and durability. If the properties of calcined bauxite aggregate are precisely defined, either surface friction or MPD can solely be utilized as the frictional metric for quality assurance (QA) of HFST.

Characterization of Fabric Friction Performance by CHES-FY System

2013 ◽  
Vol 821-822 ◽  
pp. 1492-1498 ◽  
Author(s):  
Rui Qiang Gao ◽  
Zhao Qun Du ◽  
Wei Dong Yu
Keyword(s):  
Linear Regression ◽  
Correlation Analysis ◽  
Multiple Linear Regression ◽  
Surface Friction ◽  
Regression Equation ◽  
New Apparatus ◽  
Friction Performance ◽  
Fabric Surface ◽  
Orthogonal Tests

The paper mainly introduces a new apparatus (CHES-FY) to measure fabric surface friction. Compacted with the KES-FB system, the CHES-FY system has its own superiority. Through designing orthogonal tests, corresponding properties of 16 groups fabrics were measured by CHES-FY system. Based on the correlation analysis between KES-FB system with CHES-FY system, it indicates that the two systems have high correlations. Thereafter, regression equation that includes four parameters through multiple linear regression were achieved. It reports that CHES-FY system is feasible and accurate in measuring fabric surface friction performance.

Sign in / Sign up

Export Citation Format

Share Document